| Ettevõtte nimi | Reg. kood |
|---|---|
| HEFT OÜ | 12773902 |
| HEFT EHITUS OÜ | 17253751 |
| INVIKTO HEF OÜ kustutatud | 11701243 |
| HEFTOS OÜ kustutatud | 14314392 |
| HEFTIGE OÜ | 14172880 |
| HEFTIGE KINNISVARA OÜ | 14653697 |
| LEFT OÜ | 12652133 |
| HEST OÜ | 10054592 |
| HEAT3 OÜ (endine nimi 3 Selli OÜ) | 11256808 |
| HET OÜ | 14734935 |
| COZY HEAT OÜ | 14595758 |
| HEUT DESIGN OÜ | 12874520 |
| HELT EHITUS OÜ kustutatud | 12444156 |
| HEAT SOLUTIONS OÜ | 16051672 |
| HELT CONSULT OÜ | 17144683 |
| HERT JMV OÜ kustutatud | 10265053 |
| NORDIC HEAT OÜ kustutatud | 12502528 |
| LEFT DESIGN OÜ | 12585394 |
| HEAT POWER OÜ | 12770401 |
| HEAT NRG OÜ | 12239195 |
| HELT INVESTMENTS OÜ kustutatud | 12481884 |
| HEST FENCING OÜ | 12617547 |
| HEAT UP OÜ kustutatud | 12733660 |
| HEST GRUPP OÜ kustutatud | 12282386 |
| DEFT TRUCK OÜ kustutatud | 11012779 |
| INVERTER HEAT OÜ | 16024994 |
| FOMAD HEAT OÜ | 16576096 |
| HEMT HOLDING OÜ | 16626629 |
| HEMT GRUPP OÜ | 17283278 |
| HEAT-EST OÜ | 14775532 |
| LEFT EYE OÜ | 16447476 |
| HEMT CONSULTING OÜ | 17032033 |
| HEAT EXCHANGER OÜ kustutatud | 14776810 |
| OSCO HEAT OÜ | 12293674 |
| LEFT REALITY OÜ | 14696465 |
| HEAT BUILDER OÜ kustutatud | 11443315 |
| HEAT RECYCLERS OÜ | 12423266 |
| HIGH HEAT OÜ | 16123845 |
| APRANGA HEST OÜ | 14075697 |
| HEAT SERVICE OÜ | 12081558 |
| EFT TRADE OÜ | 16996734 |
| OPAL HFT OÜ kustutatud | 12384939 |
| VENTUS ECO HEAT OÜ (endine nimi VENTUS Solar 1 OÜ) | 17060974 |
| HEAT-ENER GROUP OÜ | 12945616 |
| NORDIC HEAT GROUP OÜ kustutatud | 14774308 |
| HEAT BY NATURE OÜ | 12522330 |
| HEAT AND ENERGY CONSULTING OÜ kustutatud | 12730755 |
| HEAT AND COOL CONSTRUCTIONS OÜ | 16774710 |
| VENTUS ELECTRICITY AND HEAT OÜ (endine nimi VENTUS Electricity and Heat Atlasa OÜ) | 17180236 |
| VENTUS ELECTRICITY AND HEAT JUGLA OÜ (endine nimi VENTUS Electricity and Heat 1 OÜ) | 17012252 |